In a large bowl of electric mixer, combine water and milk powder. Stir until milk dissolves. Add yeast, then sugar, salt, butter, egg and 2 cups or 200g flour. Mix at low speed of mixer until ingredients are wet, then for 2 minutes at medium speed. Add 2 cups or 200g flour, mix on low speed until ingredients are wet and then for two minutes at medium speed. (Dough will vbe getting stiff and remaining flour may need to be mixed by hand.) Add about 1/2 cup or 55g flour and mix again, by hand or mixer. Dough should be soft, not overly sticky, and not stiff. (It is not necessary to use the entire amount of flour)

Scrape dough off sides of bowl and pour about one tablespoon of vegetable oil around sides of bowl. Turn dough over in vegetable oil all around sides of bowl so it is covered with oil. (This helps prevent dough from drying out.) Cover with plastic and allow to rise in warm place until double in size. Sprinkle cutting board or counter with flour and place dough on floured board. Roll out and cut rolls into desired shape and size. Place on greased (or parchement lined) baking pans. Let rise in warm place until rolls are double in size (about 1-11/2 hours).